The electronic band structure of twisted bilayer graphene develops van Hove singularities whose energy depends on the twist angle between the two layers. Using Raman spectroscopy, we monitor the evolution of the electronic band structure upon doping using the G peak area which is enhanced when the ...
The electronic band structure of twisted bilayer graphene develops van Hove singularities whose energy depends on the twist angle between the two layers. Using Raman spectroscopy, we monitor the evolution of the electronic band structure upon doping using the G peak area which is enhanced when the ...
Band structure and insulating states driven by the Coulomb interaction in twisted bilayer graphene 来自 掌桥科研 喜欢 0 阅读量: 50 作者:T Cea,F Guinea 摘要: We analyze the phase diagram of twisted graphene bilayers near a magic angle. We consider the effect of the long range Coulomb ...
Bernal bilayer graphene (BLG) offers a highly flexible platform for tuning the band structure, featuring two distinct regimes. One is a tunable band gap induced by large displacement fields. Another is a gapless metallic band occurring at low fields, featuring rich fine structure consisting of four...
It is well established that strain and geometry could affect the band structure of graphene monolayer dramatically. Here we study the evolution of local electronic properties of a twisted graphene bilayer induced by a strain and a high curvature, which are found to strongly affect the local band ...
Twisted bilayer graphene (tBLG) with C vacancies would greatly improve the density of states (DOS) around the Fermi level (EF) and quantum capacitance; however, the single-band tight-binding model only considering pz orbitals cannot accurately capture the low-energy physics of tBLG with C ...
(Q) factor value of 637. The physical mechanism of the narrow absorption is investigated by electric field,magnetic field, andPoynting vectordistributions. The influence of thegeometric parametersof the unit-cell structure on theabsorption propertiesof the proposed PMA is also studied. As a ...
In this work, we have demonstrated a terahertz (THz) device with strong chirality and asymmetric transmission effect based on a twisted bilayer alpha-MoO3. The unique optical response can be realized by adjusting structural parameters such as the thicknesses of the layers as well as the angle ...
twisted graphene bilayer Wei Yan1,*, Wen-Yu He1,*, Zhao-Dong Chu1,*, Mengxi Liu2, Lan Meng1, Rui-Fen Dou1, Yanfeng Zhang2,3, Zhongfan Liu2, Jia-Cai Nie1 & Lin He1 It is well established that strain and geometry could affect the band structure of graphene monolayer dramatically....
Bistrizer, R. & MacDonald, A. H. Moiré bands in twisted double-layer graphene.Proc. Natl Acad. Sci. USA108, 12233–12237 (2011). ArticleGoogle Scholar Sato, K. et al. Zone folding effect in RamanG-band intensity of twisted bilayer graphene.Phys. Rev. B86, 125414 (2012). ...